Broan Attic Fan (340, 343, 350, 353) Replacement Motor # 97009316 1160 RPM 120V 5" Diameter Motor; 3.4 amps, 115V Shaft 1/2" x 2 3/4" with flat; Rotation CW Shaft End Motor length less shaft 2 1/4" 3 mounting studs on back, 4" on center 1 Year Manufacture Warranty